1 2 1 dimensions: FFTW on vector of size 10 3 Error norm of |x - z1| 7.23451 4 5 2 dimensions: FFTW on vector of size 100 6 Error norm of |x - z1| 74.7894 7 8 3 dimensions: FFTW on vector of size 1000 9 Error norm of |x - z1| 739.169 10 11 4 dimensions: FFTW on vector of size 10000 12 Error norm of |x - z1| 7661.66 13